Art of deodorizing isopropyl alcohol



ll ntented daily 2% 'lltli fiho areer reach caiar. o. or. menace; NEW'IJ'ERSEY, assrcnon ro s'rannann hammer-rear cotrieanr, a coaroiaarron or nnriawann. 1

anti or nnozoo aizme Isornomrr. aacoiron.

Etc Drawing,

The deodorizin g of iso propy lialcohol de- I rived. from the propylene contained inthe gases from oil stills is rendered exceptionally difiicult by reason of the minute pro- 3 portions of impurities present and of the ohscure nature of their composition. They appear to he complex sulfur compounds.

. In accordance with the present invention such isopropyl alcohol may be deodorized in w the following manner. The alcohol is boiled with charcoal containing-adsorbed oxygen under a reflux condenser. The proportion ofcharcoal employed may suitably he as high as 1% has been found'to'be satl5 ist'actory under ordinary circumstances.

After heating for a short period, 'say minutes to 1 hour, the alcohol is distilled off and condensed. i

The charcoal employed. is preferably "heate'djin an autoclave, in which case the re- I fluxcondenser may be dispensed with.

Application filed August l7, 1921.. Serial No. 4993;135-

vvhen saturated withadsorloed oxygeni It is hencepreferred to prepare the charcoal by heating itto a red heat andsuhsequently placing 'it'in an atmosphere of oxygen or plating it inf'a conduit or tube through which oxygen is passed.

.The alcoholand charcoal may suitaloly be I claim g 1..lhe method of deodorizing isopropyl alcohol prepared from oil refinery gases which comprises heating such alcohol with charcoal containing "adsorbed-oxygen.

2; The method ofdeodorizing isopropyl alcohol prepared from oil refinery gases which comprises heating such alcohol with activated charcoal containing adsorloed oxygen. I 3. The method of deodorizinp' isopropyl alcohol. prepared from oil refinery gases which comprises boiling such alcohol with u to 5% of. activated charcoal saturated with adsorbed oxygen, and subsequently disbilling 0d the alcohol.

V CARL 0. JUHNSQ 

